I played with a few design ideas last night and a delta bot in 10 days looks doable. I am going to stop by the hobby shop on my way home to check out their links and rods.
I am going to try to do this with only one order from McMaster and one from Digikey.
I will use a bowden extruder to start with. I want to keep the end effector as light as possible. Later down the road I thought it might be fun to experiment with a tiny NEMA 14 at the nozzle working in tandem with a larger stepper at the other end of the filament. That is if I am unhappy with the bowden.
With a delta, you can't hide
all the wires because you need to at least power and thermister wires to the nozzle. I am going to use very high strand count "kinkless" test lead wires for the power. That flexibility might give me some more options.
My friend Edward Ford was also invited to ORD Camp and is working on something to bring too, so we having a dual design review tonight. I ran early ORD Bot design ideas past him.
BTW: I got several offers for X3's, so I got one.

. It would have been a crime to use a red hot plate and fugly RAMPS.